8,918 Answered Questions for the topic statistics

Statistics

08/13/22

Anscombe's Quartet (1973)
A problem involving this dataset appeared recently in one of my student's assignments. You can try it too.1.) Google "Anscombe", "quartet", and "kaggle." This will lead you to a site where you... more
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Statistics Probability

08/13/22

I need some help with creating a contingency table.
A. A party mix of candy contains a blend of M&Ms, Reese's Pieces, and Skittles. The blend is 50% M&Ms, 30% Reese's Pieces, and 20% Skittles. M&Ms are 14% yellow, Reese's Pieces are 25%... more
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Statistics Math

08/13/22

I'm not sure how to approach these 2 problems.
1: A certain disease has an incidence rate of 0.5%. The false negative rate on a test for the disease is 5%; the false positive rate is 5%. Compute the probability that a person who tests positive... more
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Statistics Probability

08/13/22

1:Use the following probabilities to answer the question. Don't round; enter your answers as ratios
P(A)=0.4  , P(B)=0.65 ,  and  P(A and B)=0.2P(B∣A)=______  P(notB∣A)= ________P(notB∣notA)= _________
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Statistics

08/13/22

1: Compute the probability that a person who tests positive actually has the disease. (You may find it useful to construct a probability contingency table.)
1: A certain disease has an incidence rate of 0.5%. The false negative rate on a test for the disease is 5%; the false positive rate is 5%. Compute the probability that a person who tests positive... more
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Statistics Math Algebra 2 Calculus

08/12/22

finance perpetuity question
Anne plans to retire at 65 and wants a perpetual monthly income of $4000 from then on. Knowing that market fluctuations happen, she invested in a fund that pays the Inflation Index + 6% per year to... more
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Statistics

08/12/22

Help Please! Find Sample test statistic and P-value
In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 71 out of a random sample of 86 guests did, in fact, catch... more
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Statistics

08/12/22

Help Please! Find Sample test statistic and P-value
In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 71 out of a random sample of 86 guests did, in fact, catch... more
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08/10/22

Probability &statistics
News reports tell us that the average American is overweight. Many of us have tried to trim down to our weight when we finished high school or college. And, in fact, only 20% of adults say they do... more
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Statistics

08/09/22

Statistics HW Question!
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 43 farming regions gave a sample mean of  = $6.88 per 100 pounds of watermelon. Assume that 𝜎 is... more
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Statistics

08/07/22

Statistics Question
Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a... more
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Statistics

08/07/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Statistics

08/06/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Statistics Math Probability

08/06/22

Probability of cards
How many numbers of possible live card hands (hands in five-card poker) drawn without replacement from a standard deck of 52 playing cards?Please give full details!
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Statistics Math Probability

08/06/22

Estimation of probability

Let the random variable X be the number of months that a certain owner of an estate needs to pay a loan in the Bank if he/she has a contract with insurance company to help him/her to pay a loan.Say... more
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Statistics Probability

08/03/22

Discrete probability distribution

You are given the following discrete probability distributions: X        0        1          2            3 P(X)  0.10   0.20     0.30      0.40 A. Compute the mean(expected value) B. Compute the... more
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Statistics Math Probability

08/03/22

Probability statistics discrete
The weights of the male diabetic patients of a given hospital are normallydistributed with mean 68kgs and standard deviation 4kgs. If a patient is selected randomly.a)What is the probability that... more
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Statistics Probability

08/03/22

Statistics probability

Suppose that the number of a village development committee have been categorized as shown in the following... more
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Statistics Probability

08/03/22

Binomial distribution

Using the binomial distribution to determine the following: a)If n = 4 and p = 0.20, then P(X=1) = ? b)If n = 3 and p = 0.10, then P(X<2) = ? c)If n = 6 and p = 0.30, then P(X>1) = ?
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Statistics Math

08/03/22

Statistics - Hypothesis Testing

A textile fiber manufacturer is investigating a new drapery yarn, which the company claimshas a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms.The company wishes... more
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Statistics

08/03/22

Hypothesis Testing - Power of Test
Suppose we are going to test null hypothesis whether the mean height of student grade 10is 115cm against the alternative hypothesis as µ > 115 cm. Assuming that the height ofthe student is... more
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Statistics

07/31/22

The annual rainfall in a certain region is approximately normally distributed with
The annual rainfall in a certain region is approximately normally distributed with mean 41.6 inches and standard deviation 5.4 inches. Round answers to the nearest tenth of a percent.a) What... more
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Statistics

07/31/22

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 54.3 inches, and standard deviation of 2.4... more
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Statistics

07/31/22

Statistics help

Suppose you have 18 red marbles and 24 blue what is the probability of pulling two red at the same time ?
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Statistics

07/30/22

What's the percentage using the quantitative mean and SD?

The GRE has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores are distributed normally.(A) What percentage of test takers score above 600?(B) What percentage... more
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